Leak-proof insulator



Feb. 25, 1930. K s v 1,748,884

LEAKPROOF INSULATOR Filed July 15 1926 iiiiii a I 6 Patented Feb. 25, 1930 PATENT OFFICE DAVE) ROSCOE KITTS, OF NORTH 'IAZEWELL, VIRGINIA LEAK-PROOF INSULATOR Application filed July 13, 1928.

This invention relates to a leak-proof insulator especially adapted to be used in conjunction with the antenna wire of radio apparatus and it consists in the novel features hereinafter described and claimed.

hen the usual aerial insulator of radio apparatus is wet with rain, or covered with snow, sleet, frost, or dust, the antenna wire is grounded and a large percentage of the signal current which is picked up from the air leaks over the insulator to the ground and consequently a very weak current or signal is all that can possibly reach the receiving set of the apparatus. lVhen the sig- 5 nal current is thus weakened, it is necessary to force the set to amplify the weak signal current and this produces many unpleasant noises in the set which may be avoided by providing leak-proof insulators which prevent the escape of the current to the ground from the aerial wire when exposed to rain, sleet, snow, ice, frost, or dust.

Therefore, it is the object of the present invention to provide a leak-proof insulator of simple form, economical in production,

and which will effectually prevent the leakage of the current when subjected to the conditions and agencies stated.

With these and other objects in View, the insulator consists of a hollow cone-shaped body having an eye at its smaller end an an outstanding annular flange adjacent the eye. The larger end of the body is provided with a bell-mouthed flange. A rod is located interiorly of the body and disposed centrally thereof and connected at one end with the smaller end of the body. The rod carries an aye which is located beyond the edge of the larger end of the body and the rod also carries a flange located interiorly of the body and which is surrounded by the bell-mouthed flange thereof and spaced therefrom.

In the accompanying drawings Figure 1 is a side elevational view of an aerial with the leak-proof insulator applied thereto,

Figure 2 is a longitudinal sectional View of the leak-proof insulator,

Figure 3 is an end View of the insulator,

Serial No. 122,130.

Figure 4 is a longitudinal sectional View of a modified form thereof, and

Figure 5 is a longitudinal sectional View of still another modified form thereof.

As illustrated in Figure 1 of the drawing, the aerial consists of spaced masts 1, guys 2, insulators 3 connected with the guys, and an antenna wire at connected with the insulators. The wire at and the insulators are slanted in the usual manner and the larger ends of the insulators 3 are disposed downwardly towards the lower guys.

The leak-proof insulator consists of a hollow cone-shaped body 4 provided at its smaller end with an eye 5 and an outstanding flange 6 adjacent thereto. The body 4 is provided at its larger end with a bell-mouthed flange 7. A rod 8 is located interiorly of the body and connected at one end with the smaller end thereof. The rod 8 is concentrically positioned in the body and its side surfaces are spaced from the inner surface of the walls of the body. The rod 8 is provided at its end with an eye 9 which is located be yond the larger end of the body. The rod 8 is further provided with an outstanding flange 10 located interiorly of the body and surrounded by the bell-mouthed flange 7 thereof and spaced from the inner surface thereof.

The insulator is composed of porcelain or other electric insulating material and when applied to the aerial, the bell-mouthed flange 7 is downwardly disposed. Thus any moisture which may accumulate upon the exterior surface of the body of the insulator will run down the said surface and drip from the insulator at the last point of the edge of the bell-mouthed flange 7. In that the flange 10 is located interiorly of the flange 7, the wind cannot drive rain or moisture, dust, or other material into the interior of the body 4 to such an extent as to accumulate and short circuit the current gathered upon the wire 4.

In the form of the insulator as illustrated in Figure 4 of the drawings, the rod 8 is made separate from the body 4; and is connected with the body by means of a screw threaded tenon 11. In the form of the invention as shown in Figure 5 of the drawings, the rod 8 is formed integral with the body 4 and is provided at its outer end with a threaded tenon 12 which is screwed into the eye 9 and flange 10.

From the above description taken in conjunction with the accompanying drawings, it will be seen that a leak-proof insulator is provided and which may be made from any good insulating material and of any desired form or shape and of different lengths and that the insulator is rendered leak-proof by surrounding the rod 8 thereof with a shellshaped shield or body which shelters the rod from rain, sleet, snow, frost, and dust, and that the flange which is located interiorly of the body at the larger end thereof prevents the wind from blowing rain into the body of the insulator, thus preventing grounding of the antenna wire.

Changes as to form and dimensions may be resorted to without departing from the spirit of the invention as claimed.

Having described the invention, what is claimed is:

An insulator for antenna wires comprising a hollow body portion of insulating material closed at one end and outwardly flared at its other end, an external eye formed at the closed end of said body portion in connection with a head at the inner end of the eye, a rod extending from the closed end of the body portion and projecting centrally therein to a mint slightly within the open end thereof, the outer end of said rod being threaded for a short distance and provided with a shoulder at the inner end of the thread, and an eye member of insulating material having an annular flange at its inner end of slightly less diameter than the internal diameter of the open end of the aforesaid body (portion, said member also having a threade socket to receive the threaded end of the rod.

In testimony whereof, I have aflixed my signature.

DAVID ROSCOE KITTS. 

